From: Andre Przywara <andre.przywara@arm.com>
To: Jaxson Han <jaxson.han@arm.com>
Cc: mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org,
wei.chen@arm.com
Subject: Re: [boot-wrapper PATCH v2 4/8] aarch64: Prepare for EL1 booting
Date: Mon, 24 May 2021 10:32:50 +0100 [thread overview]
Message-ID: <20210524103250.493e9848@slackpad.fritz.box> (raw)
In-Reply-To: <20210521104807.138269-5-jaxson.han@arm.com>
On Fri, 21 May 2021 18:48:03 +0800
Jaxson Han <jaxson.han@arm.com> wrote:
> When booting from EL1, add a check and skip the init of
> sctlr_el2 in jump_kernel
>
> Signed-off-by: Jaxson Han <jaxson.han@arm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Cheers,
Andre
> ---
> arch/aarch64/boot.S | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
> index ee9886b..b8f9e4e 100644
> --- a/arch/aarch64/boot.S
> +++ b/arch/aarch64/boot.S
> @@ -144,10 +144,14 @@ jump_kernel:
> ldr x0, =SCTLR_EL1_RESET
> msr sctlr_el1, x0
>
> + mrs x0, CurrentEL
> + cmp x0, #CURRENTEL_EL2
> + b.lt 1f
> +
> ldr x0, =SCTLR_EL2_RESET
> msr sctlr_el2, x0
>
> - cpuid x0, x1
> +1: cpuid x0, x1
> bl find_logical_id
> bl setup_stack // Reset stack pointer
>
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next prev parent reply other threads:[~2021-05-24 22:43 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-21 10:47 [boot-wrapper PATCH v2 0/8] Add Armv8-R AArch64 support Jaxson Han
2021-05-21 10:48 ` [boot-wrapper PATCH v2 1/8] Decouple V2M_SYS config by auto-detect dtb node Jaxson Han
2021-05-21 10:48 ` [boot-wrapper PATCH v2 2/8] aarch64: Rename labels and prepare for lower EL booting Jaxson Han
2021-05-24 9:32 ` Andre Przywara
2021-05-25 1:54 ` Jaxson Han
2021-05-21 10:48 ` [boot-wrapper PATCH v2 3/8] aarch64: Remove the redundant setup_stack Jaxson Han
2021-05-24 9:32 ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 4/8] aarch64: Prepare for EL1 booting Jaxson Han
2021-05-24 9:32 ` Andre Przywara [this message]
2021-05-21 10:48 ` [boot-wrapper PATCH v2 5/8] aarch64: Prepare for lower EL booting Jaxson Han
2021-05-24 9:33 ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 6/8] gic-v3: Prepare for gicv3 with EL2 Jaxson Han
2021-05-24 9:33 ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 7/8] aarch64: Prepare for booting " Jaxson Han
2021-05-24 9:33 ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 8/8] aarch64: Introduce EL2 boot code for Armv8-R AArch64 Jaxson Han
2021-05-24 10:19 ` Andre Przywara
2021-05-25 1:59 ` Jaxson Han
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